Gahnite and Goethite Physical Properties

Gahnite

Goethite

Add ⊕

1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

4.00-4.624.27-4.29

1 7.18

1.5 Fracture

Conchoidal, Uneven

Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).

1.6 Cleavage

Indistinct parting on [111]

Perfect {010}

1.7 Mohs Hardness

7.5-85-5.5

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

FeO(OH)Arthur Thomas , Gemstones (2009)

Gahnite and Goethite Chemical Formula

While comparing Gahnite and Goethite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Gahnite and Goethite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Compare Blue Gemstones

Gahnite Vs Hydrogrossular

Gahnite Vs Indicolite Blue Tourmaline

Gahnite Vs Howlite

Gahnite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.